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With a coffee filter, a black marker, and a cup of water, discover the secret colors hidden in black ink.

1 cent - $1 per student Ages 8 - 18 5 to 10 minutes
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In this activity, learners conduct an experiment to explore how water flows up from a tree's roots to its leafy crown.

$1 - $5 per student Ages 6 - 14 1 to 2 hours
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Learners place cut flowers in colored water and observe how the flowers change. The flowers absorb the water through the stem and leaves.

$1 - $5 per student Ages 8 - 18 1 to 7 days